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B. A. CLARK.

YARN FEEDING MECHANISM FOR LOOMS.

APPLICATION FILED DEC-28. 1918.

1,307,241. Patented June 17, l9l9.

2 SHEETS-SHET.I.

miljmlll (Mfume/1 B.YA. CLARK.

YARN FEEDING MECHANISM FOR' LOOMS. APPLICATION FILED DEC- 28. 191's;

1 ,3'0'7, 24 1 Patented June 17, 1919 2 SHEETS -SHEET 2.

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BRADFORD A. CLARK, OF SLOCUM, RHODE ISLAND.

YARN-FEEDING MECHANISM FOR LOOMS.

Application filed December 28, 1918.

To all whom it may concern Be it known that I, BRADFORD A. CLARK, acitizen of the United States, and a resident of Slocum, in the county ofWashington and State of Rhode Island, have invented a new and usefulImprovement in Yarn- Feeding Mechanism for Looms, of which the followingis a specification.

This invention relates to certain new and useful improvements in a yarnfeeding mechanism for looms and it has for its principal object toprovide a mechanism for letting off or feeding the yarn in weaving so as.to preserve proper tension thereon as the diameter of the roll of yarnon the beam decreases.

Further, the invention resides in improved means for arresting thefeeding mechanism when there is an excess of delivery of yarn, saidfeeding and regulating mechanisms being under the control of the tensionof the yarn.

In the drawings Figure 1 is a fragmentary perspective view of the backof a loom equipped with the present invention.

Fig. 2 is a horizontal section immediately below the pawl-carrying disk.

Fig. 3 is a similar section immediately below the ratchet.

Fig. 1 is a fragmental side view of the construction illustrated in Fig.2.

Fig. 5 is a side elevation of the arrangement disclosed in Fig, 3.

Fig. 6 is a similar view of the intermittent feed mechanism.

Referring more in detail to the drawings, the frame 1 is provided withbearings 2 for the journals 3 of the beam 4: which carries the roll ofyarn 5, the latter being guided over the whip roll 6 having journalbearing in the rocker arms 7. These arms are fixed on a shaft 8 which isj ournaled above the beam 4: in bearings 9 and carries on one projectingend a fixed downwardly entending arm 10, and to the lower end of thlsarm is pivoted a rod 11 having slidable support in a bearing 12 on theframe.

Journaled inv an upright bracket 13 is avertical shaft 14 having a wormgear 15 fixed on its lower end in mesh with an- 7 other worm gear 16carried on the outer end Specification of Letters Patent.

Patented June 17, 1919.

Serial No. 268,620.

19 having meshing-relation with a larger gear 20 fixed to the beam 4.

Loose on the shaft 14 above the vertical bracket 13 is a lever or arm 21and above this is a loosely mounted pawl-carrying disk 22 having aperipheral tooth The arm 21 is connected at its outer end by a link 24:to the sword 25 of the lay (not shown). A pawl 26 is pivoted to the arm21 at 27 and is held against the periphery of the disk 22 for engagementwith its tooth 23 by means of a flat coiled spring 28 which is fixed tothe hub 29 of disk 22 and passed outwardly of the pawl with its free endhooked about the pivot end thereof whereby the spring will function in adual capacity, namely, to hold the pawl operative against the peripheryof the disk and to tend to rotate the disk in a reverse direction toretain the tooth 23 in engagement with the pawl.

A second yieldable pawl 30 is pivoted at 31 V i on the loosely mounteddisk 22 to coact with a ratchet 32, fixed to the upper end of shaft 13,for rotating the latter.

A pawl releasing slide 33 is slotted to receive and be guided by thevertical shaft and has sliding support on the disk 22 toward the pawl 26to push it away from the disk and out of the path of the tooth againstthe tension of spring 28 so that further oscillation of the arm 21 willhave no effect on the shaft. The outer end of the releasing slide orpusher is provided with a longitudinal slot 54 in which projects thelower end of a depending dog or stop lug 35 having adjustable securementon the rod 11. An encircling spring 36 about the rod is comcollar 27 fornormally influencing the rod in the direction of the beam whereby thewhip roll 6 will be swung upwardly.

In the operation of a loom, the lay beats up the filling which has beenlaid by action of the shuttle (not shown) in a manner. ob

vious to those skilled in the weaving art. This beating action causesintermittent tightening on the yarn and consequent downward vibration ofthe whip roll 6 which swings the lever 10 and slides the rod 11forwardly against the tension of spring 36. When the strain on the yarnis relieved the spring returns the whip roll to normal position in whichthe dog not disposed for actuating the releasing slide. Therefore, theshaft 14; and the beam 41: will be rotated in a step-by-step manner asthe sword 25 continues to oscillate the arm 21 and disk 22.

Now, should the delivery of yarn be in excess, 2'. e. if the yarn isslack, the spring 36 will be free to swing the whip roll upwardly whichmovement will cause the dog 35 to engage the rear end of slot 3% andeffect shippage of the releasing slide 33 to push the pawl fromoperative position. Thus, the continued oscillation of the arm 21 by thesword 25 will fail to oscillate the disk 32 and thereby arrest thefeeding of the yarn until such time that the slack has been taken upwhen the tightening of the yarn on the whip roll will depress thelatter, slide the rod 11 forwardly and permit the fiat spring 28 toreturn the pawl 26 to operative and the slide 33 to inoperativepositions. The yarn feeding will then be automatically resumed.

The simplicity of construction and the sureness and eificiency ofoperation are very evident in the improved take-up motion which isautomatic both as to the resuming and the arresting of the feedingoperation whether with a full or prrtly used beam. The sensitiveness ofthe whip roll may be varied' by adjustment of the dog 35 on the rod 11whereby it may be made to operate under varying degrees of slackness ofyarn. Having thus described my invention, what I claim as new and desireto secure by Letters Patent is 1. In a loom the combination with thesword of a lay and the yarn carrying beam,

of a gear fixed on the latter, a drive gear meshing therewith, a shaftcarrying the gear, a second shaft angularly disposed relative to thefirst shaft, worm gearing connecting the shafts, a ratchet fixed on thesecond shaft, a disk rotatable on the latter, and formed with a tooth, apawl pivoted on the disk to engage the ratchet, an arm pivoted on thesecond shaft, a pawl carried by the arm to engage the tooth of the disk,means connecting the arm to the sword, and means for rendering one ofsaid pawls inoperative.

2. In a loom, the combination with the' sword of a lay and the yarncarrying beam, of a gear fixed on the latter, a drive gear meshingtherewith, a shaft carrying the gear, a second shaft angularly disposedrelative to the first shaft, worm gearing connecting the shafts, aratchet fixed on the second shaft, a disk rotatable on the latter andformed with a tooth, a pawl pivoted on the disk to engage the ratchet,an arm pivoted on the second shaft, a pawl carriedby the arm to engagethe tooth of the disk, means connecting the arm to the sword, areleasing member engageable with the arm carried pawl to inoperativelydispose it, a whip roll over which the yarn is guided, a shaftsupporting the whip roll for vibration, a crank arm fixed to. the rollsupporting shaft, a slidable spring pressed rod connected to the crankarm, and a dog carried by the rod to operate the releasing member.

3. In combination with the sword-actuated, yarn letting-off mechanism ofa loom, of means under the control of the whip element of the loom foroperatively disconnecting the sword from said mechanism.

t. In combination with the sword-actuated, yarn letting-off mechanism ofa loom including a rotatably mounted toothed mem her and a cooperatingpawl, of means under the control of the whip element of the loom forremoving the pawl from the path of movement of the tooth of said memberso as to be ineffective relative thereto.

5. In a loom, the combination with the sword of a lay and the yarncarrying beam, of means operable by the sword for feeding andcontrolling the feeding of the yarn from the beam, said means includinga pawl and a cooperating toothed member, a releasin member engageablewith the arm carried pawl to inoperatively dispose it, a whip roll overwhich the yarn is guided, a shaft supporting the whip roll forvibration, a crank arm fixed to the roll supporting shaft, a slidablespring pressed rod connected to the crank arm, and a dog carried by therod to operate the releasing member.

6. In combination with the swordactuated, yarn letting-off mechanism ofa loom including a rotatably mounted toothed memher, and a cooperatingpawl, of means con trolled by the whip element of the loom fordisengaging the pawl from said member and including a member having apawl guiding edge movable from a normal position withinthe arc ofmovement of the tooth 0f the first member to a pawl-disengaging positionwithout the arcuate path of the tooth.

7. In a yarn feeding mechanism, an inter mittently operating mechanismincluding an oscillatory pawl and a cooperable toothed member movablethereby, a whip member movably mounted, and means operable by movementof the whip member to disengage the pawl from the toothed member torender the mechanism inoperable.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

BRADFORD A. CLARK.

Witnesses ADA E. HAGERTY, J. A. MILLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

